Get an error while trying to sent data by serial port on Orange pi

[GullyaShlk]

I try to communicate nextion display with Orange pi lite, I can receive data from the display, but can’t send it using WiringSerial library.

if I use common file write(), and try to catch an error by errno.h, it gives me:

value of errno 14

error printed by errno: bad address.

Edited July 11, 2022 by GullyaShlk